What size tire can I run on a 15x7 Weld ProStar w/a 4.5" BS?

[GlockandRoll]

Would the 275/50/15 fit w/out a spacer?
I'm assuming it would becuase of the narrower wheel.

Also, what is the preferred size for the fronts on a 15x7" wheel for street use?
I prefer a smaller OD tire, but dont know how to size it.

 

[UNGN]

Narrower is actually worse with 4.5" backspacing.

A 9" wheel with 4.5" backspacing would be perfect. A 7" wheel puts the bulge very close to the frame.

 

[2QUICK2B6]

8 with 4.5 bs here 275/60's works 275/50's did also

 

[GlockandRoll]

Thanks guys.. so what tire size SHOULD I use if I want to run the 15x7's all the way around?

I'm not taking it to a track, but if I can make it stick at red lights to embarrass modern pony cars even more-so that would be great!.